Mystery Component CH002 26-16 , Jura E8 Espresso Machine Control Board

[electrokiwi]

Does anyone have any idea what this device may be or recognize the manufacturers logo?
If the representation printed on the package is anything to go by, It looks like a 2 resistor package with some kind of coupling between the resistors. I have an issue with spontaneous shutdown of the coffee maker and having replaced already the Main Transformer with Thermal switch and the 3 main switching Triacs without success, now I'm wondering about this component.

 

[bertus]

Hello,

The part shown looks like a common mode choke.

Bertus

 

[electrokiwi]

Thanks Bertus, I believe you are right, Armed with your invaluable hint, I found this pic from Stack Exchange which looks pretty close to the printed symbol.

Even the component designation makes sense now, CH002 I guess stands for Choke type 002. Unfortunately it doesnt seem to be a failure prone part. I am going to have to get in with my meter while the unit is live and try to trace the failure point. Luckily it ovcurs quite frequently

Thanks,
Steve

 

[MartinN]

Hi electrokiwi/Steve,

This is the longest shot ever. I have a Jura Z6 that shuts down spontaneously. I was looking at the power board trying to identify my CH002 component when I found this thread.

Did you ever find the problem with your machine? Any suggestion would be highly appreciated. I am a humble software engineer, so this is beyond me.

Kind regards,
Martin

 

[electrokiwi]

Hi Martin,
Yes I did ! The spontaneous shutdowns of my E8 plagued me for 6 months before I managed to resolve it. I replaced all sorts of semiconductors like Triacs, optocouplers etc without success. It was also made difficult by the fact that I couldnt measure voltages with
the machine in an assembled state. Anyway the problem turned out to be.....tadaah.... The main recifier diodes in the power supply! They measured fine on diode test with a multimeter but for some reason they were not. I cant remember exactly which of the 4 diodes they were, it was a year ago! I believe it was D17, D18, D19, D20. (Located next to the connector with Yellow/Orange wires that go the main transformer, see the atatched pic) I just had a quick look in my workshop and found 4 x 1N5401 diodes in my diode bin that look like the ones I pulled from the machine. I had a string of 1N5408 diodes on hand that I used to replace them. A year on and the machine has never missed a beat!
I hope it works for you.
br,
Steve

 

[MartinN]

Thank you so much, Steve.

My board looks a little different, but I have the same diodes at roughly the same place. I don't have a workshop full of components, so I just ordered a set of new diodes. Will report back when I have them installed. Fingers crossed!

Kind regards,
Martin

 

[samscott]

Does anyone have any idea what this device may be or recognize the manufacturers logo?
If the representation printed on the package is anything to go by, It looks like a 2 resistor package with some kind of coupling between the resistors. I have an issue with spontaneous shutdown of the coffee maker and having replaced already the Main Transformer with Thermal switch and the 3 main switching Triacs without success, now I'm wondering about this component.

I’m curious — when yours were failing, did you notice any visible signs on the board like discoloration or heat marks around that connector near the yellow/orange transformer wires, or was it purely an electrical fault that only showed up under load? I’ve got a similar intermittent shutdown issue and your experience is pointing me in that direction.

 

[electrokiwi]

There was no discoloration of the PCB, so no excessive heat from a high resistance which causes that find of visible sign. The shutdowns occurred intermittently under varying loads or even no load with the machine on but idle. Mostly though, it occurred during brewing or milk heating operations. Only replacing the main rectifier diodes fixed it for me. You could try just reflowing the solder joints to see if that helps.